Chuck



Dec. 15, 1931. J. E. BAINES ET AL CHUCK Filed Sept. 29, 1950 I5 Sheets-Sheet E g. Q Nu Q 15, 1- J. E. BAINES ET AL 1,337,095

CHUCK Filed Sept. 29, 1930 3 Sheets-Sheet 3 56 o o o l v u h J 5 l g /42 40% 4I 1760 2110719: JO5PH f. 54/A/E5 4/74 J4C05 P. 506.45.

Md-VM Patented Dec. 15, 1931 UNITED AT PATENT OFF-ICE Josmnnrms Ann AcoB r. nosLE, or riirrsnfimn, PENNSYLVANIA, Assmuons T NATIONAL TUBE company, A conrormrron or new JERSEY CHUCK Application filed- September 29, 1 30. "Serial No. 485,286.

drical bodies, itis desirable to maintain the.

19 work in the gripping device and to remove the same therefrom without interrupting the operation of the machine, or even though it is necessary or desirable to stop the machine for loading and unloading the work therefrom, it is advantageous to provide means for gripping the work in a simple and expe- V dient manner. 1

The present invention is an improvement on the chuck operating mechanism disclosed in the aforementioned Letters Patent in that it provides for instantaneous gripping or releasing of pipe at the will of the operator by a mechanism which is adapted to come into action gradually and without jar or loss of 35 time. i

The object and nature of the present invention will become more apparent from a consideration of the accompanying drawings in which like reference characters designate like parts and in which Figure 1 is an end elevational view of a chuck and chuck operating mechanismembodying the principles of this invention.

Figure 2 is a cross-sectional View thereof taken on the line IIII of Figure 1.

Figure 3 is a plan view of the chuck with the cap and keeper ring removed.

Figures 4, 5 and 6 are'views diagrammatically illustrating the chuck operating mechanism and its connected linkage;

Figure 7 is a sectional plan taken on the line VIIVII of Figure 1.

lVith reference to Figures 1 to 3, inclusive, of the drawings, the chuck therein illustrated is generally of the construction shown and described in the aforementioned patent and comprises a chuck housing 2 having a projecting flange 3 within which is disposed a cam ring 4 provided with cam plates 5 which are adapted to engage rollers 6 mountgranted to Joseph E. Baines et al. on July 10, j

' 19 which are disposed in peripheral ed'in a retaining ring 7 The rollers are loosely mounted in'slots of the rin 7 and are. adapted to be engaged by the lnclined' faces of the cam plates to alter their radial position with respect to the axis of the chuck.

A ring gear 8 is concentrically mounted with the cam ring a and is adapted to actuate the rollers through the ring 7 to which it is secured. The chuekhousing 2 is recessed at 9 andlO for receiving gear wheels 11,12 and 13offlwhich the wheels 11 and 13 are in constant engagement with the ring gear 8 and the gear wheels 11 and 12in constant en gagement with a pair of rack blocks 14 andl5 I A keeperring 16 and cap ring17 are secured to the chuck housing 2 to retain thev elements hereinbefore described in their proper positions'in the chuck housing.

The hereinbefore described mechanism is the same asthat disclosediin the aforeinem. V

tioned Letters Patentand the novelty ofthe present invention resides in the manner of actuating the rackblocks 14 and 15, to opcrate the grippingmechanism of the chuck while the latter is in motion.

The operating mechanism for actuating the grippers consists of a, pair of drums 18 and grooves 20and 21 provided 'in the chuck housing, the drum 18 being slotted at 22 and the drum 19 at. 23 for engagement wth lugs 24 and 25 of the rack blocks 14 and 15 respectively. A plurality of brake bands 26''26 and 27 '27 are suspended from fixed pins 28 and 29 and are disposed in grooves 30 of the drums1-8 and i 19; The lower ends of the brake bands are provided with eyes 31 which engage screw' nuts 32, the bands 2626 engaglng screw nuts 32 and 32 and the bands 2727"engaging'screw nuts 3333', the nuts 3233 being engaged with a'le ft and right hand.

screw'thread portion respectively of a screw shaft 35' and the nuts 32 and 33 being engaged withsimilar left and'right hand threads adapted to be mounted for rotation and hav- The screw shaft is provided with an operating shaft 39 having a short lever 40 for engagement with a link 41 one end of which is pivoted to a lever 42 carried by a shaft 43 that is angularly movable through a handle 44 by the machine operator. v

The operation ofvthe chuck is briefly as follows: The chuck is mounted on a threading or pipe cutting machine such as is commonly in use and the pipe or work to be op erated on is disposed through the central opening of the chuck. By adjusting the hand lever 44 to a position to rotate shaft 39 in one direction, one set of brake bands, such as the bands 2627, are tightened on their drum 18 by virtue of their connected nuts 32-33 traversing'the thread of the screw shaft 35 in a direction towards each other, thus drawing thebrake bands tightly around the drum. When the drum is held against rotation, the block 14 is held stationary causing the gear wheel 11 to rotate the gear ring 8 whereby the cam ring 4 is actuated and the cam plates 5 through engagement with the rollers 6,

force the latter radially inwardly to intimately grip the pipe. The operation for releasing the gripping rolls is the same eX- cepting that thehand lever 44 is turned in the direction to cause the brake bands 26- and 27 to engage the drum'19 whereby the rack block 15 is held stationary and the cam ring is actuated through the gear wheels 12 and 13. and the ring gear 8, the latter being rotated inthe opposite direction to that for gripping .the work, thus releasing the rolls and permitting the removal of the pipe.

our hands.

- JOSEPH E. BAINES.

JACOB P. BOSLE.

The grippingfor releasing of the pipe may 1 V be accomplished instantaneously at the will of the operatorwithout loss of time-since the operating mechanism is rendered operative in its opening and closing action coincident with the movement of the operating lever. The chuck Ina be held in its open or closed position inde nitely when the hand lever is in its neutral position and the use of the brake bands andoperating drums in the manner descr1bed,-,has a cushioning effect on the gripping rolls or jaws which come into action gradually and without jar or loss of time.

Although one embodiment of the invention has been herein illustrated and described, it

' will be obvious to those skilled in the art that various modifications may be made in the de- V V tails of construction without departing from the principles herein set forth.

We claim A gripping chuck comprising a housing ing a work receiving opening therein, work gripping means in said housing, actuating mechanism forsaid gripping means including a pair of drums mounted for movement on said housing, brake bands for said drums,and means for selectively engaging a set of bands with one or the other of said drums to actuate 

